:root {
    --bg: #0f1729;
    --bg-2: #16213e;
    --card: #1c2942;
    --card-2: #233152;
    --border: #2c3e5e;
    --text: #e8eef7;
    --muted: #9fb0c9;
    --primary: #4f8cff;
    --primary-d: #3a6fd6;
    --success: #2ecc71;
    --danger: #ff5c6c;
    --warning: #f5a623;
    --shadow: 0 8px 24px rgba(0, 0, 0, .25);
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: Tahoma, "Segoe UI", Vazirmatn, sans-serif;
    background: linear-gradient(160deg, var(--bg), var(--bg-2));
    color: var(--text);
    min-height: 100vh;
    line-height: 1.7;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------- نوار بالا ---------- */
.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 28px;
    background: rgba(15, 23, 41, .85);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 50;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; }
.logo { font-size: 24px; }
.nav { display: flex; gap: 8px; }
.nav a {
    padding: 8px 16px;
    border-radius: 10px;
    color: var(--muted);
    transition: .2s;
}
.nav a:hover { background: var(--card); color: var(--text); text-decoration: none; }
.nav a.active { background: var(--primary); color: #fff; }

/* ---------- ساختار ---------- */
.container { max-width: 1200px; margin: 0 auto; padding: 28px; }
.page-head { margin-bottom: 22px; }
.page-head h1 { margin: 0 0 6px; font-size: 26px; }
.subtitle { margin: 0; color: var(--muted); }

.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 22px;
    margin-bottom: 22px;
    box-shadow: var(--shadow);
}
.card-title { margin: 0 0 16px; font-size: 17px; }

/* ---------- پیام‌ها ---------- */
.flash-area { margin-bottom: 18px; }
.flash {
    padding: 12px 16px;
    border-radius: 10px;
    margin-bottom: 10px;
    border: 1px solid transparent;
}
.flash-success { background: rgba(46, 204, 113, .12); border-color: var(--success); color: #7df0ad; }
.flash-error { background: rgba(255, 92, 108, .12); border-color: var(--danger); color: #ff9aa4; }
.flash-warning { background: rgba(245, 166, 35, .12); border-color: var(--warning); color: #ffcd7a; }

/* ---------- آپلود ---------- */
.upload-card { text-align: center; }
.dropzone {
    border: 2px dashed var(--border);
    border-radius: 16px;
    padding: 48px 20px;
    cursor: pointer;
    transition: .2s;
    background: var(--card-2);
    margin-bottom: 18px;
}
.dropzone:hover, .dropzone.dragover {
    border-color: var(--primary);
    background: rgba(79, 140, 255, .08);
}
.dropzone-icon { font-size: 48px; }
.dropzone-text { font-size: 18px; font-weight: 600; margin: 10px 0 4px; }
.dropzone-sub { color: var(--muted); margin: 0; }
.selected-file { margin-top: 14px; color: var(--primary); font-weight: 600; }

/* ---------- دکمه‌ها ---------- */
.btn {
    display: inline-block;
    padding: 11px 22px;
    border: none;
    border-radius: 10px;
    font-family: inherit;
    font-size: 15px;
    cursor: pointer;
    transition: .2s;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-d); }
.btn-ghost { background: var(--card-2); color: var(--text); border: 1px solid var(--border); }
.btn-ghost:hover { background: var(--border); }
.btn-danger { background: rgba(255, 92, 108, .15); color: var(--danger); border: 1px solid var(--danger); }
.btn-danger:hover { background: var(--danger); color: #fff; }
.btn-small { padding: 6px 12px; font-size: 13px; }

/* ---------- فیلترها ---------- */
.filters { display: flex; flex-wrap: wrap; gap: 16px; align-items: flex-end; }
.filter { display: flex; flex-direction: column; gap: 6px; min-width: 170px; flex: 1; }
.filter label { font-size: 13px; color: var(--muted); }
.filter select {
    padding: 10px 12px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: var(--card-2);
    color: var(--text);
    font-family: inherit;
    font-size: 14px;
}
.filter-reset { flex: 0; min-width: auto; }

.toggle { display: flex; border: 1px solid var(--border); border-radius: 10px; overflow: hidden; }
.toggle button {
    flex: 1;
    padding: 10px 14px;
    background: var(--card-2);
    color: var(--muted);
    border: none;
    cursor: pointer;
    font-family: inherit;
    font-size: 14px;
    transition: .2s;
}
.toggle button.active { background: var(--primary); color: #fff; }

/* ---------- کارت‌های آمار ---------- */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 22px;
}
.stat-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 18px 20px;
    box-shadow: var(--shadow);
}
.stat-label { color: var(--muted); font-size: 13px; margin-bottom: 8px; }
.stat-value { font-size: 24px; font-weight: 700; word-break: break-all; }

/* ---------- نمودارها ---------- */
.charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
    gap: 22px;
}
.chart-card canvas { max-height: 360px; }

/* ---------- جدول ---------- */
.table-wrap { overflow-x: auto; }
.data-table { width: 100%; border-collapse: collapse; }
.data-table th, .data-table td {
    padding: 12px 14px;
    text-align: right;
    border-bottom: 1px solid var(--border);
}
.data-table th { color: var(--muted); font-weight: 600; font-size: 14px; }
.data-table tbody tr:hover { background: var(--card-2); }
.actions { display: flex; gap: 8px; }

.empty { color: var(--muted); text-align: center; padding: 20px; }
.loading { text-align: center; color: var(--primary); padding: 16px; }

.footer {
    text-align: center;
    color: var(--muted);
    padding: 24px;
    font-size: 13px;
    border-top: 1px solid var(--border);
    margin-top: 20px;
}

@media (max-width: 640px) {
    .topbar { flex-direction: column; gap: 10px; }
    .filter { min-width: 100%; }
}